Standard Pack = 1 piece(s). Drive = 1/4 IN , 3/8 IN & 1/2 IN ; Holder = Vinyl Holder ; Number of Pieces = 10 ; Set Includes = E-5 , E-6 , E-7 , E-8 , E-10 , E-12 , E-14 , E-16 , E-18 & E-20 ; Style = Torx ; Type = Torx Set ;